/**
 * The contents of this file are subject to the OpenMRS Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://license.openmrs.org
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * Copyright (C) OpenMRS, LLC.  All Rights Reserved.
 */

package org.openmrs.module.clinicalsummary.web.controller.search;

import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.TreeSet;

import org.apache.commons.lang.ClassUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.codehaus.jackson.JsonEncoding;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonGenerator;
import org.openmrs.Concept;
import org.openmrs.Location;
import org.openmrs.OpenmrsObject;
import org.openmrs.api.context.Context;
import org.openmrs.module.clinicalsummary.service.UtilService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;

import javax.servlet.http.HttpServletResponse;

/**
 */
@Controller
public class AutocompleteSearchController {

	private static final Log log = LogFactory.getLog(AutocompleteSearchController.class);

	@RequestMapping(value = "/module/clinicalsummary/search/autocompleteLocation", method = RequestMethod.GET)
	public void searchLocation(final @RequestParam(required = true, value = "term") String nameFragment, final HttpServletResponse response) {
		try {
			JsonFactory factory = new JsonFactory();
			JsonGenerator generator = factory.createJsonGenerator(response.getOutputStream(), JsonEncoding.UTF8);

			Collection<Location> locations = Context.getLocationService().getLocations(nameFragment);

			generator.writeStartArray();
			for (Location location : locations)
				generator.writeString(location.getName());
			generator.writeEndArray();

			generator.close();
		} catch (IOException e) {
			log.error("Generating json data failed ...", e);
		}
	}

	@RequestMapping(value = "/module/clinicalsummary/search/autocompleteConcept", method = RequestMethod.GET)
	public void searchConcept(final @RequestParam(required = true, value = "term") String nameFragment, final HttpServletResponse response) {
		try {
			UtilService utilService = Context.getService(UtilService.class);
			List<Object[]> objects = utilService.aggregateOrderedObs(Collections.<String, Collection<OpenmrsObject>>emptyMap(), Arrays.asList("concept"));

			JsonFactory factory = new JsonFactory();
			JsonGenerator generator = factory.createJsonGenerator(response.getOutputStream(), JsonEncoding.UTF8);

			generator.writeStartArray();
			for (Object[] object : objects)
				for (Object o : object)
					if (ClassUtils.isAssignable(o.getClass(), Concept.class)) {
						Concept concept = (Concept) o;
						generator.writeString(concept.getBestName(Context.getLocale()).getName());
					}
			generator.writeEndArray();

			generator.close();
		} catch (IOException e) {
			log.error("Generating json data failed ...", e);
		}
	}

	@RequestMapping(value = "/module/clinicalsummary/search/autocompleteValueCoded", method = RequestMethod.GET)
	public void searchValueCoded(final @RequestParam(required = true, value = "term") String nameFragment, final HttpServletResponse response) {
		try {
			UtilService utilService = Context.getService(UtilService.class);
			List<Object[]> objects = utilService.aggregateOrderedObs(Collections.<String, Collection<OpenmrsObject>>emptyMap(), Arrays.asList("valueCoded"));

			JsonFactory factory = new JsonFactory();
			JsonGenerator generator = factory.createJsonGenerator(response.getOutputStream(), JsonEncoding.UTF8);

			generator.writeStartArray();
			for (Object[] object : objects)
				for (Object o : object)
					if (ClassUtils.isAssignable(o.getClass(), Concept.class)) {
						Concept concept = (Concept) o;
						generator.writeString(concept.getBestName(Context.getLocale()).getName());
					}
			generator.writeEndArray();

			generator.close();
		} catch (IOException e) {
			log.error("Generating json data failed ...", e);
		}
	}

	@RequestMapping(value = "/module/clinicalsummary/search/autocompleteToken", method = RequestMethod.GET)
	public void searchToken(final @RequestParam(required = true, value = "term") String nameFragment, final HttpServletResponse response) {
		try {
			List<String> tokens = Context.getLogicService().getTokens(nameFragment);
			JsonFactory factory = new JsonFactory();
			JsonGenerator generator = factory.createJsonGenerator(response.getOutputStream(), JsonEncoding.UTF8);

			generator.writeStartArray();
			for (String token : tokens)
				generator.writeString(token);
			generator.writeEndArray();
		} catch (IOException e) {
			log.error("Generating json data failed ...", e);
		}
	}
}
